Pressure-gage.



PATENTED JUNE 18, 1907.

J. R. GOEHRING. PRESSURE GAGE.

APPLICATION FILED BBPT.1,1906.

UNITED STATES PATENT OFFICE.

JOHN 1i. GOEHRING, OF PHlLADElJPlllA, .llCNNSYLVANlA, ASSlGNOlt TO T. BROOM BELFIELD, OF PHILADELPIHA, PENNSYLVANIA.

PRESSURE-GAGE.

Specification of Letters Patent.

Patented June 18, 1907.

Application filed September 1,1906. Serial No. 332,918.

To (LZZ ZUZ'Z/(HIZ/ it min/y concern:

Be it known that I, J ()HN R. Gonnnnve, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Pressure-Gages, of which the following is a specification.

The object of my invention is to make a simple and substantial pressure gage that can be readily assembled without in any way affecting the accuracy of the gage. This object I attain in the following manner, reference being had to the accompanying drawing, in which:

Figure 1 is a face view of .my improved gage with the dial and glass broken away to illustrate my invention Fig. 2 is a sectional view on the line 22, Fig. 1, the mechanism being shown in full lines. Fig. 3, is a sec tion on the line 33, Fig. 1; Fig. 4, is a de tached perspective view of the dial; Fig. 5, is a detached perspective view of the supporting frame for the mechanism, and Fig. 6, is a view of a modification.

A is the casing of the made of struck up sheet metal having a back a and an annular flange a. 2, is made integralwith the flange although in some instances it may be made separate, as shown in Fig. 6, in which a is the back and a is the annular flange.

The flange a/ is perforated at the lowest point and passing through the perforation is a screw threaded extension I) of the head B to which is attached the Bourdon tube C.

D is a struck up sheet metal frame clearly shown in Fig. 5, which has a projecting portion d clamped between the head B and the flange a of the casing. Coniining screws 1/ pass through the flange and the extension and into screw threaded openings in the head B, thus the three parts are held firmly together.

Carried by the frame D is a plate d which is secured to the frame by screws (1 In the frame and the plate is mounted the pivot e of the hand or indicator E, and pivoted at f to the frame and plate is a lever F made in two sections, one section being adjustable on the other and the outersectionf being in the form of a toothed segment which engages a pinion e on the pivot 54 of the hand. This adjustable arm is common in this type of gage.

The back, as shown in Fig.-

The short arm of the lever F is connected by a link 1 to a pro e ction c on the free end of the tube (,3, so that when fluid under prcssure is admitted to the tube the mechanism will be moved to indicate the pressure.

H is the dial, clearly shown in Fig. 4, which has a series of lugs ft bent in the manner shown in Figs. 3 and f, so that the projecting ends will rest upon the edge of the flange a of the casing A, and in order to provide a firm seat for the glass 1 which incloses the dial the lugs 7b are flattened as shown clearly in Fig. 3, so as to provide sufficient bearing for the glass.

The glass is held in place by a ring t having a deep f'lange i which snugly fits the flange a of the casing. This ring may be secured to the casing in any suitable manner or may be simply a neat fit. I

It will be seen that the lugs 71 on the dial are of such a height that they will leave a clear space for the free movement of the hand E between the dial-and the lass, as illustrated in Fig. 2.

The above arrangement enables me to make a very cheap and substantial pressure gage which can be made in many different sizes and is espcciall y applicable for use where a cheap and accurate gage is required.

It will be noticed that the extension (I of the frame D is curved to fit the curved flange of the body portion A and the base of the head B is also curved for a like purpose.

The body of the gage instead of being made of heavy cast metal as heretofore, is made light so that the gage can be mounted on a pressure pipe without additional supports if desired, although screws or bolts may be passed through the back of the gage if it is desired to firmly attach the body portion to a fixed support.

The ring may be made of stamped metal the same as the body portion and. there no additional cost in making the dial with projecting lugs, as these lugs are formed at the corners which are usually cut away for scrap.

The frame is made from stamped sheet metal bent to the required. form.

In Fig. (i, l have shown the back a made separate from the annular flange (15 of the casing and have shown a flat ring i which secures the glass to the body portion, and. 1

form. an annular groove (0* in the flange a into which is bent the projection i of the ring, thus the parts are locked securely together.

I claim:-

1. The combination in a pressure gage, of a sheet metal body portion, a head having a stem projecting through the flange of the body portion, a Bourdon tube carried by the head, a struck up metal frame having an eX- tension clamped between the head and the body portion and carrying the indicating mechanism, substantially as described.

2. The combination in a pressure gage, of a flanged casing, a head having a stem projecting through the flange of the casing and curved on its under side, a Bourdon tube carried by the head, a sheet metal frame having a curved extension clamped between the head and the flange, means for securing the parts together, and indicating mechanism carried by the frame and connected to the tube, substantially as described.

3. The combination in a pressure gage, of a body portion, pressure indicating mechanism, a dial having projecting lugs shaped so as to rest upon the edge of the frame, a sheet of glass for inclosing the dial, the glass resting upon the projecting lugs of the dial, and means for securing the glass to the frame, substantially as described.

4. The combination in a gage, of a body portion, pressure indicating mechanism mounted in the body portion, a dial inclosing the indicating mechanism, said dial having lugs at the edge bent so as to rest against the edge of the body portion and providing a flat bearing surface, a sheet of glass resting upon the flat bearing surface of the lugs, and a ring confining the glass and dial to the body portion, substantially as described.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing Witnesses.

JOHN R. GOEHRING.

Vitnesses:

GEO. W. CLEMENT, W. C. SoI-IULTE. 

